Nothing is done yet.
The logistical and financial problems are enormous to restore a mandatory military service of 6 months.
- The military doesn't have the money to finance it
- They do not have enough men to supervise young people
- They do not have the barracks to house them
The Parliament is much more cautious about this idea, they are proposing a reinforcement of civic education in middle school, one week of service during the summer holidays at 16 years old, and regrouping all the current voluntary services.
Compulsory service has its worth, sure. While in the rest of the western world college kids are... well, college kids, here university students are (more or less) grown-up adults with level heads. But it's just not worth it. A Militarized society isn't worth it, and forcing 16 year olds to give up a week of their summer holidays to suffer in the military definitely isn't a good idea. France should just not do it, as simple as that. You don't need that, you shouldn't make your people go through that.
I'm against any change to the current system of military service (one day when you are 18), but I don't think young people will suffer with a week in the military, which will likely to be an extended version of the current day of military service: passing some kind of french tests, receiving some lectures on the Republic and the army, first aid training, ...
This would be a waste of time but nothing more.